Stock Compensation Plan (Details Narrative)						12 Months Ended
	Apr. 02, 2018 Number shares	Sep. 27, 2017 Number shares	Apr. 04, 2017 Number shares	Sep. 14, 2016 Number shares	Apr. 05, 2016 Number shares	Dec. 31, 2018 USD ($) Number $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Jun. 14, 2018 shares	Jun. 13, 2013 shares
Number of shares granted for purchase during period						605,000	576,000	527,000
Aggregate intrinsic value of outstanding | $						$ 2,047,176	$ 5,935,112	$ 8,939,488
Aggregate intrinsic value of options exercisable | $						2,047,176	5,896,112	6,156,928
Intrinsic value of options exercised | $						$ 509,770	$ 3,030,119	$ 1,018,730
Weighted-average remaining contractual term						7 years 10 months 25 days	6 years 9 months 18 days	5 years 7 months 6 days
Stock compensation expense of general and administrative expenses | $						$ 1,115,395	$ 928,977	$ 463,864
Restricted Stock [Member]
Grants vest term						5 years
Unamortized stock option expense | $						$ 1,296,604
Weighted-average remaining contractual term						3 years 4 months 24 days
Number of granted, shares	45,000		45,000	20,000	40,500	47,000	56,000	60,500
Number of participants in restricted stock grants awarded | Number	2		2	1	2
Fair value of restricted stock grants | $						$ 616,200	$ 845,870	$ 627,085
Stock compensation expense of general and administrative expenses | $						$ 497,715	$ 385,514	$ 600,814
Unrestriced shares granted, per share | $ / shares						$ 13.11	$ 15.10	$ 10.37
Unrestricted Common Stock [Member]
Number of granted, shares						2,000
Unrestriced shares granted, per share | $ / shares						$ 15.13
Ten Directors [Member] | Restricted Stock [Member]
Number of granted, shares		11,000				2,000
Number of participants in restricted stock grants awarded | Number		10				10
Stock Options [Member]
Grants vest term						1 year
Unamortized stock option expense | $						$ 318,552
Stock Options [Member] | Thirty Four Employees [Member]
Number of shares granted for purchase during period							576,000
Fair value of grant shares | $							$ 1,042,000
Stock Options [Member] | Forty Employees [Member]
Number of shares granted for purchase during period						605,000
Fair value of grant shares | $						$ 1,243,000
Stock Options [Member] | Thirty Four Employees [Member]
Number of shares granted for purchase during period								527,000
Fair value of grant shares | $								$ 425,000
Stock Options [Member] | Eight Employees [Member]
Number of exercised shares						128,500
Stock Options [Member] | Twenty Seven Employees [Member]
Number of exercised shares							547,900
Stock Options [Member] | Twenty Employees [Member]
Number of exercised shares								277,500
Stock Options [Member] | One Employee [Member]
Number of shares expired or forfeited						2,000	10,000	50,000
2013 Stock Option and Stock Award Plan [Member]
Stock option authorized to grant to officers and key employees									2,000,000	3,000,000
2013 Stock Option and Stock Award Plan [Member] | Restricted Stock [Member]
Available for grant under plan						1,961,500